Add raw GET for WP.org client

[jkmassel]

Description

Adds the ability to get the raw data from a WP.org GET request.

We need this to be able to pass the raw JSON to GutenbergKit without parsing it first.

Testing Details

Will be part of the WP-ios PR.

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• [ ]
  WordPressKit.zip

[dangermattic]

	1 Warning
⚠️	Package.swift was changed without updating its corresponding Package.resolved. Please resolve the Swift packages as appropriate to your project setup (e.g. in Xcode or by running swift package resolve).

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